<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>数据代理的定义</title>
</head>
<body>
    
</body>
<script>
    
    // 通过obj2 来修改并访问obj1 里面的值
    let obj1 = {
        x:100
    }
    let obj2 = {
        y:1000
    }
    Object.defineProperty(obj2,'x',{
        get(){
            return obj1.x
        },
        set(value){
            obj1.x = value
        }
    })
</script>
</html>